Multiple Data Feeds (Instruments) on a single strategy

I am new to Back trader and I am in need of your help to test my strategy on multiple instrument data.
I have pasted the code below, I am expecting the strategy to run for both the data feeds, but actually its running for only one data feed. Please let me know what I should be changing to make it run for both the instrument data feeds. Thanks in advance

In that case, wouldn't cerebro.run( ) execute twice? If I run twice then I would get two different datasets.
What if, I want to execute this strategy on both data sets and generate single report as one single portfolio.